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HandWiki. Nuclear Clock. Encyclopedia. Available online: https://encyclopedia.pub/entry/28880 (accessed on 25 September 2026).
HandWiki. Nuclear Clock. Encyclopedia. Available at: https://encyclopedia.pub/entry/28880. Accessed September 25, 2026.
HandWiki. "Nuclear Clock" Encyclopedia, https://encyclopedia.pub/entry/28880 (accessed September 25, 2026).
HandWiki. (2022, October 11). Nuclear Clock. In Encyclopedia. https://encyclopedia.pub/entry/28880
HandWiki. "Nuclear Clock." Encyclopedia. Web. 11 October, 2022.
Nuclear Clock
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The content is sourced from: https://handwiki.org/wiki/Engineering:Nuclear_clock

A nuclear clock or nuclear optical clock is a notional clock that would use the frequency of a nuclear transition as its reference frequency, in the same manner as an atomic clock uses the frequency of an electronic transition in an atom's shell. Such a clock is expected to be more accurate than the best current atomic clocks by a factor of about 10, with an achievable accuracy approaching the 10−19 level. The only nuclear state suitable for the development of a nuclear clock using existing technology is thorium-229m, a nuclear isomer of thorium-229 and the lowest-energy nuclear isomer known. With an energy of about 8 eV, the corresponding ground-state transition is expected to be in the vacuum ultraviolet wavelength region around 150 nm, which would make it accessible to laser excitation.

electronic transition atomic clock vacuum ultraviolet

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